Malicious PDF — malware analysis report

Static analysis result for SHA-256 2404814f2ee137fd…

MALICIOUS

PDF

67.0 KB Created: 2021-01-05 22:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 10bffbba78b3c27c289c499f747c6748 SHA-1: 9a5378ccdf604dda44054a51f2c4828eec6570ca SHA-256: 2404814f2ee137fdb5374448b4d9f24860ddc41c5954ed1f9c85df7dee6737f8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to Weebly and S3 domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/aws?utm_term=simple+editable+cv+templates+free PDF link annotation
    • https://jiwenetitorod.weebly.com/uploads/1/3/5/3/135325203/noximulolafufufam.pdfIn PDF document text
    • https://jaxiweweso.weebly.com/uploads/1/3/1/4/131437584/pevirozubux-rilugugejozi-makidebivejusi-pobamugoxo.pdfIn PDF document text
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/kekifosunusarofav.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/82a7ad.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/OUggYgj/59862569944.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/3ac78b13b13.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/OmjhbYn/80836346789.pdfIn PDF document text
    • https://tifunubuxeji.weebly.com/uploads/1/3/4/5/134523212/nulafowomizik.pdfIn PDF document text
    • https://wapubepedud.weebly.com/uploads/1/3/1/4/131455956/gavurakixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/osprey_stratos_34_carry_on.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jedifujefip.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/winrar_64_bit_windows_10_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/sas_proc_import_excel_all_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/pillars_of_eternity_2_deadfire_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6B 5604 bytes
SHA-256: 6fa5a30eaaa4a2c1537eeb6174a857f99c02129cc77abf1965aff687763b717a
font_01_sfnt_off0000dd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD61 10000 bytes
SHA-256: b18eed66671610abd7dd29589e658b29c331d6ae5d23bf74850072eb6d1a8899

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